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Earth Timeline
flashcards of 28 events that happened in Earth's history
28
Environmental Studies
12th Grade
09/24/2013

Additional Environmental Studies Flashcards

 


 

Cards

Term
4.56 Billion Years Ago
Definition
Earth Forms
Term
4.4 Billion Years Ago
Definition
Oldest Mineral Grain found
Term
4.1 Billion Years Ago
Definition
Oldest piece of rock ever found
Term
3.9 Billion Years Ago
Definition
Oldest evidence of a continent
Term
3.8 Billion Years Ago
Definition
First Evidence of Life
Term
3.5 Billion Years Ago
Definition
First Fossils (algae and bacteria)
Term
1.8 Billion Years Ago
Definition
Free O2 in atmosphere
Term
1.1 Billion Years Ago
Definition
First fossil of a complex orgasnism (a worm)
Term
540 Million Years Ago
Definition
First Abundant Life found in the Rock Record
Term
460 Million Years Ago
Definition
First Fish
Term
440 Million Years Ago
Definition
First Land Plants
Term
410 Million Years Ago
Definition
First Land Animals
Term
250 Million Years Ago
Definition
Largest Mass Extinction
Term
247 Million Years Ago
Definition
First Dinosaurs
Term
240 Million Years Ago
Definition
First Mammals
Term
220 Million Years Ago
Definition
Break-up of super continent Pangaea begins
Term
145 Million Years Ago
Definition
First flowering plants
Term
65 Million Years Ago
Definition
Dinosaurs and other animals go extinct
Term
30 Million Years Ago
Definition
Mammals/ flowering plants become abundant
Term
5 Million Years Ago
Definition
Beginning of Cascade
Term
1.8 Million Years Ago
Definition
First primate in genus Homo
Term
40,000 Years Ago
Definition
First Homo Sapiens
Term
13,000 Years Ago
Definition
Humas first inhabit North America
Term
10,000 Years Ago
Definition
End of Last Ice Age
Term
8,000 Years Ago
Definition
Founding of Jericho, the first known city
Term
2,000 Years Ago
Definition
Roman domination of the World
Term
500 Years Ago
Definition
European rediscovery of the Americas
Term
About 34 Years Ago
Definition
Humans first explore the Moon
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